mirror of https://github.com/M66B/FairEmail.git
107 lines
3.3 KiB
Kotlin
107 lines
3.3 KiB
Kotlin
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package androidx.room
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import androidx.annotation.RestrictTo
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import androidx.sqlite.db.SupportSQLiteStatement
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/**
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* Implementations of this class knows how to delete or update a particular entity.
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*
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* This is an internal library class and all of its implementations are auto-generated.
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*
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* @constructor Creates a DeletionOrUpdateAdapter that can delete or update the entity type T on the
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* given database.
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*
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* @param T The type parameter of the entity to be deleted
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*/
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@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP_PREFIX)
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abstract class EntityDeletionOrUpdateAdapter<T> (
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database: RoomDatabase
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) : SharedSQLiteStatement(database) {
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/**
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* Create the deletion or update query
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*
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* @return An SQL query that can delete or update instances of T.
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*/
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abstract override fun createQuery(): String
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/**
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* Binds the entity into the given statement.
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*
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* @param statement The SQLite statement that prepared for the query returned from
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* createQuery.
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* @param entity The entity of type T.
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*/
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protected abstract fun bind(statement: SupportSQLiteStatement, entity: T)
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/**
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* Deletes or updates the given entities in the database and returns the affected row count.
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*
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* @param entity The entity to delete or update
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* @return The number of affected rows
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*/
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fun handle(entity: T): Int {
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val stmt: SupportSQLiteStatement = acquire()
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return try {
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bind(stmt, entity)
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stmt.executeUpdateDelete()
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} finally {
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release(stmt)
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}
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}
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/**
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* Deletes or updates the given entities in the database and returns the affected row count.
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*
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* @param entities Entities to delete or update
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* @return The number of affected rows
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*/
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fun handleMultiple(entities: Iterable<T>): Int {
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val stmt: SupportSQLiteStatement = acquire()
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return try {
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var total = 0
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entities.forEach { entity ->
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bind(stmt, entity)
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total += stmt.executeUpdateDelete()
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}
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total
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} finally {
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release(stmt)
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}
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}
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/**
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* Deletes or updates the given entities in the database and returns the affected row count.
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*
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* @param entities Entities to delete or update
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* @return The number of affected rows
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*/
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fun handleMultiple(entities: Array<out T>): Int {
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val stmt: SupportSQLiteStatement = acquire()
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return try {
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var total = 0
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entities.forEach { entity ->
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bind(stmt, entity)
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total += stmt.executeUpdateDelete()
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}
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total
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} finally {
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release(stmt)
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}
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}
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}
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